US 12,137,420 B2
Data transmission method and apparatus
Xianda Liu, Beijing (CN); Liuliu Ji, Shanghai (CN); and Kunpeng Liu, Beijing (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Mar. 26, 2021, as Appl. No. 17/214,347.
Application 17/214,347 is a continuation of application No. PCT/CN2019/108251, filed on Sep. 26, 2019.
Claims priority of application No. 201811133863.0 (CN), filed on Sep. 27, 2018.
Prior Publication US 2021/0227472 A1, Jul. 22, 2021
Int. Cl. H04W 52/14 (2009.01); H04L 1/00 (2006.01); H04L 27/20 (2006.01); H04L 27/26 (2006.01); H04W 52/36 (2009.01); H04W 72/044 (2023.01); H04W 72/23 (2023.01)
CPC H04W 52/146 (2013.01) [H04L 1/0003 (2013.01); H04L 27/2082 (2013.01); H04L 27/2636 (2013.01); H04W 52/365 (2013.01); H04W 52/367 (2013.01); H04W 72/0473 (2013.01); H04W 72/23 (2023.01)] 17 Claims
OG exemplary drawing
 
1. A method for data transmission, wherein the method comprises:
determining, by a terminal device, a channel transmit power for first uplink data;
determining, by the terminal device, an actual transmit power for the first uplink data based on the channel transmit power and a transmission parameter, wherein the actual transmit power is less than or equal to the channel transmit power, wherein the actual transmit power is Pt>(N/M)×pp when the transmission parameter satisfies a first condition, wherein Pp is the channel transmit power, N is less than M, M is a quantity of antenna ports configured by a network device to send the first uplink data, N is a quantity of non-zero power antenna ports that are in the M antenna ports and that are used to send the first s uplink data, N is an integer greater than or equal to 1, and M is an integer greater than 1, and wherein the transmission parameter comprises one of the following:
a power headroom, wherein the power headroom indicates a difference between a maximum transmit power allowed by the terminal device and the channel transmit power, and wherein the channel transmit power is less than or equal to the maximum transmit power allowed by the terminal device;
a waveform used to send the first uplink data;
a downlink control information (DCI) format used to schedule the first uplink data;
a modulation and coding scheme (MCS) used to send the first uplink data; or
a power adjustment value used to send the first uplink data; and
sending, by the terminal device, the first uplink data at the actual transmit power.